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Finding the Fourth Proportional to 407,790.50, 562,555.60 and 286,998.80

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Solution

The fourth proportional to 407,790.50, 562,555.60 and 286,998.80 is: 395,920.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,790.50 : 562,555.60 = 286,998.80 : x
  2. Step 2: Convert to fraction form
    407,790.50/562,555.60 = 286,998.80/x
  3. Step 3: Cross multiply
    407,790.50x = 562,555.60 × 286,998.80
  4. Step 4: Simplify right side
    407,790.50x = 161,452,778,603.01
  5. Step 5: Solve for x
    x = 161,452,778,603.01/407,790.50
  6. Step 6: Final answer
    x = 395,920.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.